Surfacing machine



May 6 ,1924; 1,493,147

A. E. CHAPPELL.

SURFACING MACHINE Filed Dec. 6. 1922 z sneezs-sheet 1 Patented May 6,1924.

UNITED STATES main PATENT OFFICE.

ARTHUR E. CHAPPELL, OF WAUKEGAN, ILLINOIS.

sU'RrAoINo MACHINE.

Application filed December 6, 1922. Serial at. 605,179.

To all whom it mil/y concern:

Be it known that I, ARTHUR E. CHAPPE'LL, a citizen of the United States,residing at Waukegan, in the county of Lake and State of Illinois, haveinvented certain new and useful Improvements in. Surfacing Machines, ofwhich the following is a speci-- 7 or from the floor to give the desireddepth ofcut. Furthermore, machines have been designed in whichthe frame,or a portion thereof, carrying the surfacing cylinder, has been providedwith adjusting mechanism by which the position of the cylinder' could beadjusted. All of such machines, however, possess such rigidity andinflexibility that the surfacing cylinder is 'n'o't'permitted toaccommodate itself, to various conditions of the floor, and if thetravel of the machine is stopped, the cylinder makes a groove or atleast a mark where itcontinues to operate for. any considerable periodof time. I TOne of the purposes of my present invention is to providemechanism which will be under the constant controlof the operator, andwhereby the pressure of the surfacing cylinder upon the floor or othersurface being worked can be regulated and increased or diminished atwill as the machine is traveling along. The operator is therefore ableto feel the irregularities' and high spots in the floor and can increasethe pressure of the surfacing cylinder when required, or can N diminishit when low spots are encountered; and furthermore, when turning orstopping the machine, the cylinder. can be lifted from the floorwithoiit'the' necessity of disturbing its adjustmerits or-ofmanipulating a normally locked adjusting lever.- v

Anotherfipurpos'e of the invention is to provide a machine of thecharacter indicase; which Willbe eeeable cf accurate ad'- justment andcontrol; one in which thesurfacing cylinder will be yieldingly urgedinto contact with the surface being worked; and one which will be simplein construction, economical to manufacture, and accurate and efiioientin operation. To facilitate an understanding of my invention, I haveillustrated on the accompanying drawings a preferred embodiment thereof,and referring to the drawings:

Fig. l is a side elevation of a machine embodying my invention;

Fig. 2 is a rearelevation the'reof;

Fig. 3 is a sectional view ,on the line 33,

of Fig. 2; and v Fig. 4 isa fragmentary sectional view on the line 44 ofFig. 1.

From an inspection of the drawings it will be observed that my improvedmachine comprises a frame structure 5, preferably 1 ofbex-likeconstruction, adapted to accommodate the dust delivering fan 6 on-theinside thereof,".and to carry the driving motor? which is mounted on thetop of the frame and connected by a driving chain 8 withthe'sprocketwheel 9 of the fan and the driving'sprocket wheel l1 of the surfacingcylinder 12. This cylinder may be mounted in any preferred manner, butis illustrated herein as carried between the forward ends of a pair ofarms 13, extending respectively throughfront and rear guide members 14and. 15, in whichthese arms are yieldingly retained bybuifer blocks 16adapted to be adjusted by adjusting screws 17. r

The frame is carried principally by a pair of wheels 18 mounted upon atransversely extending shaft 19,, which is disposed substantially midwaybetween the ends of the frame structure so that the frame isnearlybalanced thereon, the rear end being slightly heavier so that the'frametends to tilt downwardly at the back, and the wheels being ofsufficientheight to pen. mit a degree of tilting of the frame, whichwill bring the surfacing cylinder into contact with the floor, orclearit some distance from the floor, as shown in Fig. 1, in which positionthe cylinder is of course inoperative,

To the rear end ofthe framethere is rigidly attached an upwardly andrear wardly projecting'bar or pole 21, provided at it's'upper end. witha handle 22 disposed in accessible position to the operator, who walksbehind the machine." In order to be accessibly positioned, the startingand controlling box 23 of the motor is preferably mounted upon this bar,as shown in Fig. 1. For the purpose of tilting the frame about the axle19, so as to urge the surfacingcylinder against the floor with anydesired degree of pressure, I have provided at the rear end of the frameauxiliary supporting caster wheels 24, rotatably mounted in ballbearings 25,- which are carried by a CIOSS? bar 26. The ends of thiscross-bar are engaged and adapted to vertically'slide in guideways 27formed in the rear ends of the side members of the frame; and to permitof a considerable latitude of vertical movement, the ends of the bar 26are .provided with upwardly projecting gui-de:.portions 28 adapted for.relative vertical movementwith respect tothe guides .27, as willbe-apparent from Figs. Qand 3.;

'Upon the bar 21,;fin proximity. to the handle 22, there is}pivotallyfmounted at 29 a hand lever31,'whichiextends beneath and in thegeneral direction of one end of thehandle, the short endof thisleverbeing adjustably' connected by a'screw clamp 32 with the upper section33 ofaconnecting rod, the lower section 34: of which-is connected by abolt 35with the bar 26. It will be apparent that-by swinging the lever31 from the full line to the dotted line position shown in Fig.2,therear endlof the frame will be elevated, thus depressing thesurfacingroll into engagement with the floor, and upon release of this lever theframe will tilt in the opposite directionto clear the surfacing cylinderfromthe fioor; -In order to, provideffor. flexibility independently ofthe .movementlof the, lever 31-, which permits a limited tiltingmovement of the frame, I have interposed between the sections 33 and 84:of the thrust rod a coiled expansionspring 36 (Fig. 4). .A sleeve 37,secured to one of the. rod sections by a pin 38, surrounds the springand receives the opposed end of the otherrod section, which is equippedwitha pin 37 adapted to slide in a slot 39 formed in'one sideofthesleeve. A downward thrust. of the rod section 33 will therefore beyieldingly transmitted to thesection 34, and consequently tothe auxil-viary caster wheels 24, andanyuslight vertic'al vibratory movements of.the surfacing cylinder, are accordingly. absorbedby. the spring insteadof beingtransmitted in. full force to the. hand .of: theoperator,;,which is ar pingtheleven 31.. Inthe operation ofmy machinetheop-l erator grasps theQhandles ;22. ,withrboth hands, the fil'igersof-one hand" at the same time grasping the lever 31 and pullingnitupwardly toward. the rhandlen22. This movement ofthelever exerts adownward.

thrust, upon ,thecaster .wheels, :which. re sults 1n tilting the .rearend of :the machine upwardly, and the forward end downwardly to engagethe surfacing cylinder with the floor. As the machine progresses acrossthe floor, any irregularities in the floor surface'may' be detected bythe operator by the feel of the lever 31, and he may therefore increasethe pressure of the cylinder when high spots are encountered, or relieve the pressure when low spots are encountered. The surfacingcylinder is therefore at all times under the direct control andmanipulation of the operator, who is able to regulate the pressure ofthe cylinder to meet the requirements and conditions of the surfacebeing worked. When the travel dfithe machine isto be stopped or whenturning around, the cylinder can be cleared from the .floor by simplyreleasing the: lever 31. The operator is therefore notobliged to eitherdisturbtheadjustments of the cyl; inder or to release .and manipulateamen nally. locked adjusting lever, as is custom; arily necessary inmachines of ,thisqgen eralcharacter l," 3* I i It isbelievedthatthe-principles and, the advantages of my invention will. beunderstoodwithout further description, and it shouldbemanifest thatit iscapable ofem+ bodiment in. constructions differing materially in theirdetailsfrom those illustrated and described,; without departing 'fro mthe scope o f theinventiomas defined in thefollowing claims. v jIrclaim: In a surfacing machinethe combina; tion of a, v framestructure, a surfacing cylinder mounted on the, forward end thereof,supporting wheels intermediate the ;ends 'of said, frame, a handleconnectedwith the rear end of the frame, .a bar having-,iupturned endsslidably connected wit-lithe rear. endof saidframe, a caster wheelsupporting said bar, ahand lever adjacentsaid handle, and a connectionbetween said lever and said bar whereby relative vertical movementbetween said caster wheel and; the rearendof said frame maybe impartedupon -m an-ipu5 lation of said lever. I

2. In a surfacing machine the combinae tionef a frame, supporting wheelsinter mediate the ends thereofxabout which: said frame is adapted totilt. a surfacingi .tool at the forward en'd'of said frame, abarslidably associatedwith the rear end, of said frame, a. castenwheelnsupporting said. bar, a handle 'connected'with the rear-end of theframe, a lever. pivotallymounted in posi-, tion to :be grasped -.by thehand ofthe operator engaging said handle,'rand a connection between saidlever and saidbarfor regulating' the, vertical position of I said bar.withrespect to the rear end of saidframe. :In ,asllrfacing machinethecombination of p a. frame, supporting-wheels Tintermed a e th ed$ he0f tr ns er r tending bar slidably associated with the rear end of saidframe, a pair of caster wheels supporting said bar, a handle rigidlyconnected with the rear end of said frame, a controlling lever disposedin proximity to said handle, and a yielding connection between saidlever and said bar.

4. In a surfacing machine the combination of a frame, a pair of mainsupporting Wheels about which said frame is adapted to tilt, a pair ofcaster Wheels slidably associated with the rear end of said frame, ahandle, a controlling lever in proximity to said handle, and a yieldableconnection between said lever and said caster wheels.

5. In a surfacing machine the combination of a frame, a pair ofsupporting wheels therefor about which the frame is adapted to tilt, acaster wheel slidably associated with the rear end of said frame, a barrigidly connected with said frame, a handle carried by the bar, a leverpivotally mounted on said bar in proximity to said handle, and aconnection between said lever and vsaid caster Wheel, including a springproviding resiliency between said caster wheel and said lever.

6. In a surfacing machine the-combination of a frame, supporting meanstherefor about which said frame is adapted to tilt, auxiliary supportingmeans slidably connected with the rear end of said frame, a bar rigidlymounted on the frame, a handle carried by the bar, a lever pivoted onthe bar adjacent to the handle, a rod adjustably connected with saidlever, a connect-ion between said rod and said auxiliary supportingmeans, and a spring providing flexibility in said rod.

A. E. CHAPPELL.

